Question

What is the relationship between alkanity and atmospheric pressure?

Answer 1

Alkalinity is the capacity of water to resist changes in pH that would make the ... The total alkalinity is not (much) affected by temperature, pressure, or pH

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Answer 2

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A greater alkalinity will increase the ability of water with pH of 8.3 or less (free carbon dioxide does not exist in water with pH above 8.3) to hold carbon dioxide as illustrated for pH 7 and 7.5